VOLUME AND MARKET PROFILE.

Volume is the most-quoted and least-understood input in retail trading. Every charting platform displays it. Almost no one reads it correctly. Market Profile is even worse — a futures-floor tool from the 1980s that was repackaged for retail traders without the context that made it work. This lesson puts both back on solid ground.

What volume actually measures

Volume is the number of contracts, shares, or lots that changed hands in a given period. That is the whole definition. It is a measure of activity, not of direction. Every transaction has a buyer and a seller, and the volume bar counts both sides equally. A huge volume bar does not mean buyers won. It means a lot of people traded.

What volume actually tells you is how much agreement there was at the current price. High volume means the market is doing business here — buyers and sellers both think this price is worth transacting at. Low volume means the market is thin — few participants agree this price is interesting.

That distinction matters because it changes what you do with the signal. A high-volume candle at the top of a trend is not bullish. It is the market saying "a lot of people are willing to sell at this price." Whether it continues up depends on what price does next. Volume told you the market was busy. It did not tell you who won.

Reading the volume bar

The volume bar sits below the price chart, one bar per candle. Its height is the total volume traded during that candle's period. Its relationship to the surrounding bars is the signal, not its absolute value.

A single high-volume bar in isolation means nothing. A high-volume bar relative to the prior twenty bars means the market just did something unusual. That is the signal you act on.

Volume confirms, price delivers

Volume is a confirmation tool, not a prediction tool. It tells you whether the market agreed with the last move, and it gives you a hint about whether the next move is likely to continue.

Three signals matter, and they show up again and again on every timeframe:

Market Profile — the map of time

Market Profile was developed by Peter Steidlmayer at the Chicago Board of Trade in the 1980s. The core idea was radical at the time: instead of plotting price over time, plot time over price.

Every 30-minute period during the trading day is assigned a letter — A, B, C, and so on. Each letter is plotted at the price level where that period traded. Stack the letters and you get a histogram of where the market spent its time.

The result is a distribution. Some prices are visited for hours. Others are crossed in seconds. The shape of that distribution is the market's own map of value — the prices where buyers and sellers agreed to do business, and the prices where they did not.

Market Profile is usually associated with futures, because the futures market has a defined session, a central exchange, and real volume data. But the concept applies to any market. In forex, where there is no central exchange, the equivalent tool is the volume profile.

Value Area, POC, VAH, VAL

Four reference lines do all the work on a Market Profile or Volume Profile chart:

The 70% rule is a convention, not a law. Steidlmayer settled on it because it matched the statistical concept of a standard deviation — about 68% of a normal distribution falls within one standard deviation of the mean. The number stuck. In practice, 68–75% gives you roughly the same lines.

How you use them:

• Price above VAH — the market has accepted a higher range. Watch for a retest of VAH as support.
• Price below VAL — the market has accepted a lower range. Watch for a retest of VAL as resistance.
• Price returns to POC — common after a range extension. The POC is the market's gravitational centre for the session.
• POC becomes VAH or VAL — the profile has shifted. The prior POC becomes the new edge of value. That is a new trend in profile terms.

High-volume and low-volume nodes

Inside any profile, some price levels hold a lot of volume, and some hold almost none. The two are called High-Volume Nodes (HVN) and Low-Volume Nodes (LVN).

The behaviour of price through these nodes is predictable:

Practical use: LVNs act like gaps. When price re-enters an LVN, it tends to move fast through it — sometimes in the same direction as the original move, sometimes reversing. The key is that the LVN does not offer much support or resistance. Do not put a limit order inside an LVN.

HVNs act like magnets. Price moves slowly through them, and often returns to them after a move. A retest of an HVN is a legitimate trade location — but the reaction is slow, so you need patience and a wider stop.

Volume Profile vs Market Profile

Both tools show the distribution of activity at price. They measure it differently:

Forex volume — the tick caveat

Forex is decentralised. There is no central exchange, no single order book, and no official volume figure. Every "volume" figure you see in a retail forex platform is a proxy.

What MetaTrader, TradingView and most retail platforms show for forex is tick volume — the number of times the price changed during the period, aggregated by the broker's feed. It is not the number of contracts. It is not even a consistent measure across brokers, because each broker's feed aggregates a different slice of the market.

Tick volume is still useful. It correlates well with real volume in liquid markets and short timeframes. A spike in tick volume during a breakout almost always means real activity. But its absolute values are meaningless — you cannot compare tick volume on EURUSD with tick volume on GBPJPY as if they were both measuring the same thing.

When this fails

Volume and Market Profile fail in four predictable situations: